Design And Implementation Of ECU Monitoring System For Functional Safety

With the information technology developing, the automotive industry has coming to a new stage. The significant feature of this stage is that electronic control units(ECU) in the vehicle is increasing, and hardwares and softwares’ s integration are more and more complex. Because of the ECU will running at some special environment, these technologies bring convenience and comfort to people but also cause some risks in cars. To make reduce these risks, we have to ensure the validity of ECU’s function, so need closely monitoring of ECU. However the functional safety standard IEC61508 used in the industrial control domain is not suitable for automotive industry. In 2011 the International Organization for Standardization based on IEC61508 released ISO26262. It redifined the safety concept and the products’ life cycle, make the two concepts more standarlized and practical for automotive industry field.However, it’s a complex process to develop some system softwares which compliance with functional safety standard ISO26262, it needs to co-design and co-verification the software architecture and hardware architecture in the design phase and requirement analysis phase.To address this problem and based on the research about the safety-critical software development processesin ISO26262, the thesis designed a monitoring system architecture which for functional safety and independent of paticular hardware and paticular application.Using the E-GAS system as example, the thesis described the process of the establishment of E-GAS monitoring system, and using the simulation tool CANoe to build a simulation environment for testing the system’s functions and integrity.The main works of the thesis are as follows:1. Researched on functional safety standard ISO26262 and analyzed the key concepts, and then described the safety critical software developping processes which based on ISO26262.2. Analysised the monitoring system architecture’s requirements on two aspects from software architecture and hardware architecture. Based on the software engineering and functional safety concepts, the thesis designed a monitoring system architecure with the properties of hierarchical and modular.3. Did a reasonable module division for the monitoring system and described the detail implementation mechanismsof the key modules.4. Described the detail implementation processes of build the E-GAS monitoring system based on functional safety standard ISO26262. And at last, by using TriCore and CANoe, the thesis established a simulation enviroment and did some appropriate test for the monitoring system.